Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Statement of Financial Position [Abstract]
Allowances for losses on accounts receivable	$ 6,371	$ 6,238
Accumulated depreciation and amortization	$ 582,286	$ 565,119
Common stock, par value (in dollar per share)	$ 2	$ 2
Common stock, authorized (shares)	200,000	200,000
Common stock, issued (shares)	77,220	77,199
Commons stock, outstanding (shares)	77,220	77,199